KR20010055776A - Low nosie amplifier of mobile telephone - Google Patents
Low nosie amplifier of mobile telephone Download PDFInfo
- Publication number
- KR20010055776A KR20010055776A KR1019990057084A KR19990057084A KR20010055776A KR 20010055776 A KR20010055776 A KR 20010055776A KR 1019990057084 A KR1019990057084 A KR 1019990057084A KR 19990057084 A KR19990057084 A KR 19990057084A KR 20010055776 A KR20010055776 A KR 20010055776A
- Authority
- KR
- South Korea
- Prior art keywords
- amplifier
- signal
- hybrid
- receives
- low noise
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/60—Amplifiers in which coupling networks have distributed constants, e.g. with waveguide resonators
- H03F3/602—Combinations of several amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/372—Noise reduction and elimination in amplifier
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
Description
본 발명은 이동 통신 단말기의 저잡음 증폭 회로에 관한 것으로, 특히 반사계수가 적고 선형성이 향상된 이동 통신 단말기의 저잡음 증폭 회로에 관한 것이다.The present invention relates to a low noise amplifier circuit of a mobile communication terminal, and more particularly, to a low noise amplifier circuit of a mobile communication terminal with low reflection coefficient and improved linearity.
종래 이동 통신 단말기의 저잡음 증폭 회로는 도 1a에 도시된 것과 같이 하나의 트랜지스터로 구성되거나 도 1b에 도시된 것과 같이 여러개의 트랜지스터를 캐스캐이드로 연결하여 원하는 성능을 구현한다.The low noise amplifier circuit of the conventional mobile communication terminal is composed of one transistor as shown in Figure 1a or as shown in Figure 1b by connecting several transistors in a cascade to achieve the desired performance.
하지만, 종래 이동 통신 단말기의 저잡음 증폭 회로는 원하는 잡음 특성을 얻기 위해 초단증폭기의 입력에서의 반사계수가 커지고 선형성이 떨어지는 문제점이 있다.However, the conventional low noise amplifier circuit of the mobile communication terminal has a problem that the reflection coefficient at the input of the ultra-short amplifier is large and linearity is inferior in order to obtain a desired noise characteristic.
따라서, 본 발명의 목적은 반사계수가 적은 이동 통신 단말기의 저잡음 증폭 회로를 제공함에 있다.Accordingly, an object of the present invention is to provide a low noise amplifier circuit of a mobile communication terminal with a low reflection coefficient.
본 발명의 다른 목적은 선형성이 향상되는 이동 통신 단말기의 저잡음 증폭 회로를 제공함에 있다.Another object of the present invention is to provide a low noise amplifier circuit of a mobile communication terminal with improved linearity.
이러한 목적들을 달성하기 위한 본 발명은 이동 통신 단말기에서 안테나로 수신되는 신호를 입력받아 전력을 반으로 나누어 90도의 위상차를 가지는 제1 및 제2신호를 출력하는 제1하이브리드와, 상기 제1하이브리드로부터 출력되는 제1신호를 입력받아 반사계수를 조정하여 원하는 저잡음특성을 가지는 신호를 출력하는 제1증폭기와, 상기 제1증폭기로부터 출력되는 신호를 입력받아 이득을 증폭하는 제2증폭기와, 상기 제1하이브리드부터 출력되는 제1신호를 입력받아 반사계수를 조정하여 원하는 저잡음특성을 가지는 신호를 출력하는 제3증폭기와, 상기 제3증폭기로부터 출력되는 신호를 입력받아 이득을 증폭하는 제4증폭기와, 상기 제2증폭기로부터 출력되는 신호와 상기 제4증폭기로부터 출력되는 신호를 입력받아 동위상 성분만을 결합하여 출력하는 제2하이브리드로 구성되는 것을 특징으로 한다.According to an aspect of the present invention, there is provided a first hybrid for receiving a signal received by an antenna from a mobile communication terminal and outputting first and second signals having a phase difference of 90 degrees by dividing power in half, and from the first hybrid. A first amplifier configured to receive an output first signal and adjust a reflection coefficient to output a signal having a desired low noise characteristic, a second amplifier configured to receive a signal output from the first amplifier and amplify a gain, and the first amplifier A third amplifier for receiving a first signal output from the hybrid and adjusting a reflection coefficient to output a signal having a desired low noise characteristic, a fourth amplifier for amplifying a gain by receiving a signal output from the third amplifier, Receives the signal output from the second amplifier and the signal output from the fourth amplifier and outputs only the in-phase components combined It is characterized by consisting of a second hybrid.
도 1a 및 1b는 종래 이동 통신 단말기의 저잡음 증폭 회로도.1A and 1B are low noise amplification circuit diagrams of a conventional mobile communication terminal.
도 2는 본 발명에 따른 이동 통신 단말기의 저잡음 증폭 회로도.2 is a low noise amplification circuit diagram of a mobile communication terminal according to the present invention;
이하 본 발명을 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
도 2는 본 발명에 따른 저잡음 증폭 회로의 구성을 나타낸다.2 shows a configuration of a low noise amplifier circuit according to the present invention.
도 2를 참조하면, 제1하이브리드(200)는 안테나를 통해 수신된 신호(Vin)를 입력받아 제1신호()와 제2신호()와 같이 전력을 반으로 나누고,90도 위상차를 가진 신호를 출력한다.Referring to FIG. 2, the first hybrid 200 receives a signal Vin received through an antenna and receives a first signal ( ) And the second signal ( Divide the power in half, and output a signal with a 90-degree phase difference.
제1증폭기(201)는 제1하이브리드(200)의 제1출력단자로 출력되는 제1신호를 입력받아 원하는 저잡음 특성을 가지는 신호가 출력되도록 한다.The first amplifier 201 receives a first signal output to the first output terminal of the first hybrid 200 and outputs a signal having a desired low noise characteristic.
제2증폭기(202)는 제1증폭기(201)로부터 출력되는 신호를 입력받아 이득을 증폭하여 출력한다.The second amplifier 202 receives a signal output from the first amplifier 201 and amplifies and outputs a gain.
제3증폭기(203)는 제1하이브리드(200)의 제2출력단자로 출력되는 제2신호를 입력받아 원하는 저잡음 특성을 가지는 신호가 출력되도록 한다.The third amplifier 203 receives a second signal output to the second output terminal of the first hybrid 200 to output a signal having a desired low noise characteristic.
제4증폭기(204)는 제3증폭기(203)로부터 출력되는 신호를 입력받아 이득을 증폭하여 출력한다.The fourth amplifier 204 receives a signal output from the third amplifier 203 and amplifies and outputs a gain.
여기서, 제1증폭기(201)에서 반사되는 신호와 제2증폭기(202)에서 반사되는 신호는 180도의 위상차가 발생하므로 제1하이브리드(200)의 입력단으로 반사된 반사파는 제로가 된다. 따라서, 본 발명에 따른 이동 통신 단말기의 저잡음 증폭 회로의 반사계수는 종래 이동 통신 단말기의 비해 줄어드는 이점이 있다. 또한, 본 발명에 따른 이동 통신 단말기의 저잡음 증폭 회로는 전력을 반으로 나누어 각기 증폭하므로 종래 이동 통신 단말기의 저잡음 증폭기보다 선형성이 증가된다.Here, since the phase difference of 180 degrees between the signal reflected by the first amplifier 201 and the signal reflected by the second amplifier 202 occurs, the reflected wave reflected to the input terminal of the first hybrid 200 becomes zero. Therefore, the reflection coefficient of the low noise amplification circuit of the mobile communication terminal according to the present invention has an advantage of being reduced compared to that of the conventional mobile communication terminal. In addition, since the low noise amplifier circuit of the mobile communication terminal according to the present invention amplifies each of the power in half, the linearity is increased compared to the low noise amplifier of the conventional mobile communication terminal.
제2하이브리드(210)는 제2증폭기(202)로부터 출력되는 신호와 제4증폭기(204)로부터 출력되는 신호를 입력받아 동위상 성분만을 결합하여 출력한다.The second hybrid 210 receives a signal output from the second amplifier 202 and a signal output from the fourth amplifier 204 and combines only the in-phase components.
제5증폭기(205)는 제2하이브리드(210)로부터 출력되는 신호를 입력받아 증폭하여 믹서(110)로 출력한다.The fifth amplifier 205 receives the signal output from the second hybrid 210 and amplifies and outputs the signal to the mixer 110.
상술한 바와 같이 본 발명은 이동 통신 단말기의 저잡음 증폭 회로에 있어서 반사계수를 작게하고 선형성을 개선할 수 있다.As described above, the present invention can reduce the reflection coefficient and improve linearity in the low noise amplifier circuit of the mobile communication terminal.
Claims (3)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990057084A KR20010055776A (en) | 1999-12-13 | 1999-12-13 | Low nosie amplifier of mobile telephone |
| US09/734,854 US20020041207A1 (en) | 1999-12-13 | 2001-02-28 | Low noise amplification circuit of mobile communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990057084A KR20010055776A (en) | 1999-12-13 | 1999-12-13 | Low nosie amplifier of mobile telephone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20010055776A true KR20010055776A (en) | 2001-07-04 |
Family
ID=19625339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019990057084A KR20010055776A (en) | 1999-12-13 | 1999-12-13 | Low nosie amplifier of mobile telephone |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20020041207A1 (en) |
| KR (1) | KR20010055776A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900218A (en) * | 2018-08-07 | 2018-11-27 | 张家港市泰克软件有限公司 | A kind of signal enhancing equipment and Enhancement Method |
-
1999
- 1999-12-13 KR KR1019990057084A patent/KR20010055776A/en not_active Application Discontinuation
-
2001
- 2001-02-28 US US09/734,854 patent/US20020041207A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US20020041207A1 (en) | 2002-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7521995B1 (en) | Inverted doherty amplifier with increased off-state impedence | |
| EP1476949B1 (en) | Power amplification apparatus of portable terminal | |
| US8095092B2 (en) | Power efficient transmitter with high dynamic range | |
| US6326845B1 (en) | Feedforward amplifier | |
| US8400216B2 (en) | 3-way Doherty power amplifier using driving amplifier | |
| IL211874A (en) | Wireless transceiver system | |
| JPWO2005124994A1 (en) | High efficiency amplifier | |
| EP0823779A2 (en) | High-frequency amplifier | |
| CN112543002A (en) | Broadband differential Doherty power amplifier and design method and application thereof | |
| JP2006339981A (en) | Doherty amplifier | |
| US6744314B2 (en) | Wideband power amplifier linearization technique | |
| US6128478A (en) | Apparatus and method for amplifying a radio frequency signal | |
| KR20010055776A (en) | Low nosie amplifier of mobile telephone | |
| US20010022534A1 (en) | Power amplifier | |
| JP6834094B2 (en) | Doherty amplifier | |
| JP2008523763A (en) | Low loss, asymmetric combiner for adaptive phase difference system and adaptive radio frequency amplifier with asymmetric combiner | |
| JP4211128B2 (en) | Multi-channel high-frequency signal supply device | |
| CN111064481A (en) | Signal processing device and equipment | |
| WO2024157642A1 (en) | Amplification circuit and communication device | |
| US20040090271A1 (en) | Variable gain amplifier for high frequency band using microstrip hybrid | |
| JP2881043B2 (en) | High frequency linear amplifier | |
| JP2004147004A (en) | Booster device | |
| JPH05145346A (en) | High frequency amplifier | |
| KR20010077188A (en) | Linear compensation amplifering circuit of mobile communication base station system | |
| JP2001127568A (en) | High frequency power amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WITN | Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid |